Crampbuster Tr11 Leftt Throttle Rocker Ii Left (1) Throttle Rocker causes the throttle grip to rotate, so you dont have to squeeze the grip to operate the throttle. With a Throttle Rocker motorcycle cruise assist, youll be able to enjoy hours of riding without experience wrist fatigue. Why buy an expensive motorcycle cruise control when a Throttle Rocker is way less expensive, takes seconds to install, and has been proven by thousands of customers worldwide.